Results 41 to 50 of about 309 (135)

Ontogenia de la semilla de Yucca periculosa (Agavaceae)

Botan‪ical Sciences, 2017
Las semillas de algunas especies de Yucca han sido estudiadas por Arnott y Horner. Ellos se refieren principalmente al estado maduro y afirman que el tejido de reserva extraembrionario es un perispermo.
Eduardo García-Villanueva, E. Mark Engleman   +1 more
doaj   +1 more source

A new species of Hypericum section Taeniocarpium (Hypericaceae) from Türkiye

Nordic Journal of Botany, Volume 2025, Issue 12, December 2025.
A new species, Hypericum aladaglariense, is described and illustrated from Yahyalı, Kayseri Province in Türkiye. The new species belongs to Hypericum sect. Taeniocarpium. It is related to H. linarioides, H. armenum, and H. theodori, which differs by its leaves, bract, bracteole, sepal, and petal features.
Hayri Duman, Mehmet Ufuk Özbek, Ece Gökçe Çakır Dindar, Funda Özbek   +3 more
wiley   +1 more source

Early eudicot reproductive structure: Fruit and flower morphology of Ranunculaecarpus Samyl. from the Early Cretaceous of eastern Siberia

Acta Palaeobotanica, 2018
Floral and fruit morphology of the early eudicot Ranunculaecarpus quinquecarpellatus Samyl. is described based on details from sectioning and microscopy of the permineralized type material from the Albian Buor-Kemyus Formation of the Zyryanka coal basin.
STEVEN R. MANCHESTER, LINA B. GOLOVNEVA, DMITRY D. SOKOLOFF, ELSE MARIE FRIIS   +3 more
doaj   +1 more source

Seed-coat anatomy and proanthocyanidins contribute to the dormancy of Rubus seed

Rubus seed has a deep double dormancy that restricts germination due to seed coat structure and chemical composition. Improved germination of diverse Rubus species required for breeding improved blackberry and raspberry cultivars is partly dependent on ...
Reed, Barbara M., Wada, Sugae, Kennedy, James A.   +2 more
core   +6 more sources

Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook

TAXON, Volume 73, Issue 3, Page 673-717, June 2024.
Abstract The use of molecular data in phylogenetic reconstruction during more than three decades has greatly improved our understanding of the macroevolutionary history of the coffee family (Rubiaceae) and has provided a solid basis for improvement of its classification. Based on the results of 130 studies, among them most recent phylogenomic works, we
Sylvain G. Razafimandimbison, Catarina Rydin   +1 more
wiley   +1 more source

Anatomía y desarrollo de fruto y semilla de Solanum palinacanthum (Solanaceae) Anatomy and development of fruit and seed of Solanum palinacanthum (Solanaceae)

Revista Mexicana de Biodiversidad, 2007
Se analiza el desarrollo y anatomía de fruto y semilla en Solanum palinacanthum Dunal, sect. Acanthophora Dunal, subgénero Leptostemonum (Dunal) Bitter (Solanaceae). Se describen las características del pericarpo, (exocarpo, mesocarpo, endocarpo) y de la
Nilda Dottori, María Teresa Cosa
doaj  

Mongolitria: A new Early Cretaceous three‐valved seed from Northeast Asia

American Journal of Botany, Volume 111, Issue 2, February 2024.
Abstract Premise Fossil seeds recovered from the Early Cretaceous of Mongolia and Inner Mongolia, China, are described and assigned to Mongolitria gen. nov., a new genus of gymnosperm seed. Methods Abundant lignitized seeds along with compression specimens isolated from the matrix were studied using a combination of scanning electron microscopy ...
Maya A. Bickner, Fabiany Herrera, Gongle Shi, Niiden Ichinnorov, Peter R. Crane, Patrick S. Herendeen   +5 more
wiley   +1 more source

Pharmacognostical study of Sterculia monosperma fruit

Guangxi Zhiwu
Sterculia monosperma fruit is the dried and mature seed of Sterculia monosperma, which belongs to genus Sterculia. In China, this plant is a widely distributed arbor with a long planting history in Lingnan area.
PENG Xiaoqi, WU Wenru, LAI Huili, XING Bingnan, LU Yaru, ZOU Heyuan   +5 more
doaj   +1 more source